How to Remove Car Battery Corrosion

Car battery corrosion is common to happen to any car. However, Car battery corrosion can be prevented by various practices we discussed.

Only without proper attention will your car’s battery corrode, possibly leaving you without a working car. Corrosion can speedily drain the power out of a battery and shorten its lifespan. Battery corrosion is typically apparent at the terminals, a problem that can be resolved by careful and skilful cleaning.

In this article, I will show you how to remove your car battery corrosion professionally and get your car working.

What Causes Car Battery Corrosion?

Car battery corrosion occurs when your battery heats up and cools down naturally as you drive, and releases hydrogen gas as part of the ventilation process! Then this hydrogen comes into contact with surrounding materials near the terminals.

Can battery corrosion keep a car from starting?


Battery corrosion can cause your car or vehicle to not start. Battery corrosion can also lead to a myriad of other car battery problems including damage to the vehicle’s air conditioning and electrical wiring.

Does corrosion mean a Bad battery?


Corrosion on the battery terminals can be caused by a reaction between the copper and the electricity passing through them, or it can be caused by a leak at the terminals’ base. Corrosion anywhere else indicates a highly likely leak from the battery, implying that the battery is damaged.

Can a corroded battery cause car to stall?


The truth is, a loose battery terminal may not stop the car but it can cause a car to stall. In addition, if your battery is going bad or has corroded terminals, it could lead to your engine stalling.

Can a bad alternator cause battery corrosion?


When a battery is in normal operation, it emits corrosive gases. The alternator will continue to overcharge the battery, causing the battery acid to emit more corrosive hydrogen gas than is normal or safe. A faulty alternator could also be to blame.

How to Remove Car Battery Corrosion With Baking Soda and Water

To remove corrosion from your car battery, you will have to;

  1. Assemble Your Tools and Supplies
  2. Gently Disconnect the Battery terminals
  3. Remove Car Battery Corrosion
  4. Proper Clean-Up
  5. Reconnect Your Battery to Your Vehicle

1. Assemble Your Tools and Supplies

Apparently, you need to get your tools ready before any action is taken to remove the corrosion on your car battery.

You need to gather all of the necessary tools and supplies for this job.

You will need to put on safety goggles and hand gloves. Likewise, you will need to put on a work coverall. You need to make available a stiff wire brush, a cup of lukewarm or cold water, a box of baking soda, a teaspoon, and rags are required. Your tools and supplies are completed by an old toothbrush, pliers, a wrench, and petroleum jelly.

2. Gently Disconnect the Battery terminals

Use your supplied tools and equipment to gently disconnect the battery from the terminals. To do this, ensure to first disconnect the negative battery cable before the positive cable to avoid being struck by electricity.

Use the wrench and pliers to the connection and loosen. Repeat this process with the red (positive) connection.

Do not forget to place your tools away from the battery cables after loosening to avoid contact resulting in an electrical shock.

3. Remove Car Battery Corrosion

Now that the battery cables and terminals have been disconnected properly, you can now focus on removing and neutralizing the corrosion.

You can obviously make use of cleaning agents to remove the corrosion. but in the absence, you can use the combination of baking soda and water by stirring together.

Gradually pour the mixture on the battery post of each side and use your wire brush or unused old toothbrush to gently scrub off the corrosion. For tougher cases, you can leave the mixture to penetrate for at least five minutes before brushing off.

4. Proper Clean-Up

To keep your car safe from the potential damage caused by the solution and corrosive elements, take care not to let the solution or corrosive elements fall on other engine components. If at all possible, we recommend that you remove the battery completely.

After you’ve scrubbed away all the corrosion, thoroughly rinse the battery and cable ends with clean water and allow them to dry.

If possible, use an air compressor to expedite the process.

5. Reconnect Your Battery to Your Vehicle

Now that you have cleaned up all the corrosion and you ensure that everything is completely dried. You might want to reconnect your battery to your vehicle.

To do this, start by connecting the positive battery terminal first, followed by the negative one.

The removal of corrosion from a car battery is a must-know maintenance task. Keeping your battery clean will extend its life and help it perform at its peak.

If you want to add more battery corrosion preventative compounds at this point, go ahead!


The Quick and Easy Way to Clean Car Battery Corrosion is to follow these easy steps:

  1. To begin, make sure your car is turned off for your own safety. Because you will be touching the battery, it is best to turn it off.
  2. Locate the battery and disconnect the terminals. To remove them, you’ll need a wrench. Remove the negative terminal first, followed by the positive.
  3. Examine your battery for any signs of damage. While you’re in there, make sure your battery doesn’t have any bulging, cracking, or warping. These are indications that your battery may need to be replaced.
  4. A white substance will be visible on the terminals and inside the cable clamps. This is the substance that must be removed. You’ll need a toothbrush, water, baking soda, steel wool, cloth or towel to dry, and petroleum jelly.
  5. In a lid or small dish, combine a small amount of water and some of the baking soda. The paste should then be applied to the terminals and clamps with a toothbrush. Scrub vigorously until the white substance is gone. Steel wool can be used to help remove corrosion if necessary. Pay close attention to the insides of the clamps to ensure that your battery connection is as good as possible.
  6. Using a towel or cloth, dry everything off.
  7. Apply a thin layer of petroleum jelly to the terminals and clamps. This will aid in the prevention of future corrosion.
  8. Reconnect the battery, starting with the positive terminal and working your way down.


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